This article is cited in 2 papers

Optical properties

Luminescence and electronic excitations in crystals K$_2$Al$_2$B$_2$O$_7$ with defects

I. N. Ogorodnikov^a, V. A. Pustovarov^a, S. A. Yakovlev^a, L. I. Isaenko^b, S. A. Zhurkov<sup>b

a</sup> Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg
^b Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: This paper reports on the results of the comprehensive study of the dynamics of electronic excitations in K$_2$Al$_2$B$_2$O$_7$ (KABO) crystals, obtained by low-temperature luminescence vacuum ultraviolet spectroscopy with nanosecond time resolution upon photoexcitation by synchrotron radiation. For the first time, the data have been obtained on the photoluminescence (PL) decay kinetics, PL spectra with time resolution, PL excitation spectra with time resolution, and reflection spectra at 7 K; the intrinsic nature of PL at 3.28 eV has been established; luminescence bands of defects have been separated in the visible and ultraviolet spectral regions; an intense long-wavelength PL band has been detected at 1.72 eV; channels of the formation and decay of electronic excitations in K$_2$Al$_2$B$_2$O$_7$ crystals have been discussed.

Received: 17.05.2011

 English version: Physics of the Solid State, 2012, 54:1, 111–116

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